题目

Autumn is coming. The weather is getting ____. A . cool and cool B . the cooler and the cooler C . cooler and cooler D . the coolest and the coolest 答案：C抗日民族统一战线的形成和巩固是抗日战争胜利的根本保障。下列与统一战线形成密切相关的事件发生的先后顺序是 ①“八一宣言”发表 ②西安事变的和平解决 ③瓦窑堡会议 ④红军改编A.①②③④B.①③②④C.①③④②D.①④②③